DO NOT STAY IN THIS PLACE. It is actually illegal to stay in this apartment complex (M Silom) as airbnb guest. The owner reveals this information only the day before, when you have no other choice. Then he writes a dubious email to building committee, saying that the guest is a friend. You become accessory to an illegal affair. Its not a big deal, but I was not comfortable. I thought about not saying anything...but I feel it is my moral duty to notify other guests. If the reception questions you if you are a permanent resident, you have to lie.
They don't clean the place. I stayed three nights. Even after repeated request, they didnt even take out the trash. I had to take out trash or change my sheets. The bathtub was broken, no cutleries, no english tv channel and sofa had stains. After complaining repeatedly, the owner gave 10% discount but TV was not fixed.
When you are paying such high price, you can find tons of cool Airbnbs and hotels in Bangkok. Its a competitive market. Everytime I was going out, I felt an eerie sensation that the front guards would question me as I am not a permanent resident of that building. The receptionist was always giving a suspicious look. No need to hide in your own apartment like a criminal. Find another place.